A former Sugar Land health clinic manager who pleaded guilty to health care fraud in federal court could be sentenced to up to 50 years in prison, according to court documents.

Tiffany Nicole Thompson, 31, who worked at Rabon Communication Enhancement, a children's speech therapy clinic, pleaded guilty Aug. 8 to one count of conspiracy to commit health care fraud and four counts of health care fraud. Each count carries a maximum sentence of up to 10 years in prison.

Thompson and the clinic owner, Rebecca Lee Rabon, allegedly had an agreement to submit claims to insurance providers to get money for services they knew were not provided, according to the plea agreement. The scheme allegedly took place between January 2009 and November 2013, court records state.

The two women submitted at least $3.78 million in false claims to Blue Cross and Blue Shield of Texas and to Tricare, a health care coverage program for military service personnel, retirees and their dependents. Thompson and Rabon received at least $1.28 million for those claims, the plea states.

The claims were for speech therapy and swallowing therapy. Some claims were submitted under their own names and some were submitted under names of fellow clinic employees, court documents state.

Thompson is free on bail until her Oct. 24 sentencing hearing in U.S. District Judge Melinda Harmon's courtroom in Houston.

Rabon's case is pending in federal court, with trial set for Sept. 29.